gemstone
Aquamarine
Be3Al2(Si6O18)
Hardness of 7.5 to 8 on the Mohs scale, pale blue to light greenish-blue color, vitreous luster, hexagonal crystal system, distinct conchoidal fracture, and specific gravity around 2.68 to 2.74.
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Physical properties
Hardness of 7.5 to 8 on the Mohs scale, pale blue to light greenish-blue color, vitreous luster, hexagonal crystal system, distinct conchoidal fracture, and specific gravity around 2.68 to 2.74.
Formation & geological history
Formed in pegmatites and in cavities within granitic rocks through hydrothermal processes, often crystallization from cooling magma rich in beryllium, silicon, and aluminum.
Uses & applications
Widely used in fine jewelry, as a faceted gemstone, for carvings, and valued by mineral collectors.
Geological facts
Aquamarine is the blue to blue-green variety of beryl, with its name originating from the Latin words for water and sea. Large, flawless crystals of gem-grade aquamarine can be exceptionally valuable.
Field identification & locations
Identified in the field by its distinctive hexagonal prism habit, high hardness, pale blue or greenish-blue coloration, and vitreous to greasy luster. Commonly found in countries such as Brazil, Madagascar, Pakistan, and the USA.
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